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I'm speculating too...



Me too.
I am afraid that without a source to every factory print, engineering change notice, memo, TSB and anything else Chrysler used to convey production line changes. Sometimes we are reduced to educated guesses. I am glad that we have people like you, Joe, Barry, Terry, Jules, Dave Walden, Bill and all the other people that take the time to document unmolested cars and are willing to share their knowledge with fellow enthusiasts.